Piano-pupil s monitor



(No Model.)

J. A. KIESELHORST.

PIANO PUPILS MONITOR.

No. 313,502. Patented Mar. 10, 1885.

UNiTED STATES JOHN A. KIESELHORST, OF ST. LOUIS, MISSOURI.

PlANO-PUPiLS MONETOR.

SPECIFICATION forming part of Letters Patent No. 313,502, dated March 10, 1885.

Application filed December 29, 1883.

To all whom it may concern.-

Be it known that I, JOHN A. Krnsnm-rons'r, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented a new and useful -Improvement in Piano Forte-Pupils Monitors, of which the following is a specification.

My invention relates to devices for use in musical instruction, to aid the pupil in keeping the hands and wrists in the proper position; and it consists in the device constructed and described,as herein set forth and claimed. I attain this object by the mechanism illustrated in the accompanying drawings, which form a part of this specification, in which Figure l is afront elevation of a piano with my device attached for use. Fig. 2 is a de tailed bottom view with the standard-arms folded down and slid out of sight beneath a piano. Fig. 8 is a transverse vertical section through the key-board. Fig. 4 is a perspective View of the bracketarms. Fig. 5 is a detailed perspective view of the socket and parts detached.

Similar letters refer to similar parts in all the views.

Any suitable material may be made use of in its construction.

In order to supportand hold taut the elastic cord used, and also to admit of its removal from any position it may be in while in use to another position for hiding it out of sight, I make use of the following device: Two slotted blocks or lugs, A A, are secured to the bottom of a piano, E, Figs. 1 and 2, one of them near each end of the keyboard, to support and form recesses, in which the sliding arms B B, Figs. 2 and 4, are loosely placed, so they may be slid endwise backward or forward for the purpose of hiding the parts from sight when notin use. These arms are square, or nearly so, and sufficiently long for sliding in or out.. The front end of each is slotted vertically, as at a, and horizontally, as at 1), Figs. 3 and 4, at right angles to each other, entirely aeross,and to a depth equal to about onehalf of the thickness ofthe arms or standards 0 O, Figs. 2 and 4, and wide enough to permit (No model.)

these standard-arms to stand erect vertically, or to be folded down horizontally into the slots to or b by sliding them out of or into these slots on the body of the long screws 0 0, Figs. 2 and 4. The screws 0 c serve as journals, on which the standard-arms O O turn and slide, and by which they are movably fastened to the end of the sliders B B through the hole 0 Fig, 3. The head of the screws 0 c are not screwed closely against the standardarms O C. On the contrary, they stand out from it sufficiently far to permit of sliding them in or out to the depth of the slots (6 b, as desired. The staiulard-arms O O are square and of suilicient length. They are spaced off in their upper part, and bored with holes 0 and slots a alike through them in a line with the front end of the key-board, Fig. 1. \Vhen in use these arms are adjusted vertically in the slots o c of the sliders B B, supported on the screws 0 0. They form a substantial support for the elastic reminder cord D, Fig. l, which is inserted into and held by them at any desired height in the holes 0 and slot 0, Fig. 4. The flexible cord D is'held taut, and stretched between the opposite arms on a line with the key-board, and it may be raised or lowered in the holes c and slots 0 to any desired point for the pupils use. Its flexibility prevents the student from resting the hands or arms on it, as is the case where metallic or wooden rods are used for a similar purpose. The touch of the elastic cord sufficiently reminds the pnpil that its hands or arms are out of proper position, without permitting them to rest on it, as it rigid.

\Vhen not in use, by pulling the standard arms 0 0 forward on the body of the screws 0 0 out of the slots (4 a and turning them inwardly toward each other, then sliding them back on the screws into the horizontal slots 1) b, the device may be pushed back and hid den from view under the piano, as shown in Fig. 2. \Vhen wanted for use, the parts are slid forward, and the arms and cord raised, as shown in Fig. 1.

' I am aware that a flexible cord may be supported by other devices in a manner similar other keyboard musical instruments, of the to this, and operated by Weighted arms or by blocks A A, sliding arms B 13, provided 10 eccentrics. with slots a Z), standards G 0, screws 0 c, and

Having sufficiently explained my device cord D, as and for the purposes set forth. 5 and its construction and operation, What I JNO. A. KIESELI-IORST.

{vish to secure by Letters Patent is as fol- W'itnesses:

ows:

A. T. Holmes, The combination, With a piano-forte or H. M. THOMPSON 

